When it comes to harnessing solar energy for your home, selecting the right solar panels is crucial. With a wide range of options available, it's important to understand the key specifications and factors to consider before making your decision. In this blog post, we'll provide you with professional insights and answers to common questions to help you choose the perfect solar panels for your home.

 

1.Key Specifications to Look for in PV Panels.When evaluating PV panels, several key specifications should be considered

• Power Range: The range of power output a single PV panel can produce under standard testing conditions.
• Max Module Efficiency: The maximum efficiency at which the panel transfers light into electricity.
• Power Degradation: The rate at which power output decreases over time.
• Dimension: The outer dimensions of the PV panel.
• Warranty: Product warranty ensures materials and workmanship, while power warranty guarantees the panel's power output.

2.Types of PV Panels and Ideal Home Systems

• The emerging TopCon PV technology has gained popularity as it replaces the previous Perc PV technology. For residential systems, TopCon panels are a great fit, offering higher power output and transfer efficiency. Considering limited rooftop space in some regions like Germany, we recommend the 182-54cell module, which suits small spaces.

3.Available Space and Panel Size

• The space available on your roof will determine the number and size of PV panels you can install. The recommended module CHSM54N-HC has dimensions of 1722 x 1134 x 30 mm, suitable for various European rooftops. The exact number of panels will depend on your specific case and available roof area

4.Lifespan and Warranty

• Typically, the lifespan of a PV panel aligns with the power warranty period. Two types of warranties exist: product warranty covering materials and workmanship (standard is 12 years for rooftop installations) and power warranty, which guarantees power output (typically 30 years for TOPCon modules).

5.Energy Production Under Average Weather Conditions

• Using the HTM405~425MH5-54NT module as an example, in Amsterdam, a 1kW nominal power installation produces an estimated 1064kWh in the first year. In Berlin, the same setup generates approximately 1084kWh. Factors such as roof angle and installation location can affect power output.

6.Temperature Coefficient and Performance on Hot Days

• The temperature coefficient indicates how power output, open circuit voltage, and short circuit current change with temperature. For instance, the HTM405~425MH5-54NT module might experience a 0.29% decrease in power output, 0.25% decrease in open circuit voltage, and a 0.043% increase in short circuit current with each 1°C temperature increase.

7.Resistance to Weather and Environmental Factors

• PV panels undergo load testing to ensure durability. The recommended HTM405~425MH5-54NT module can withstand wind loads of 2400Pa and snow loads of 5400Pa (standard installation method). It also passes hail and UV tests according to the IEC61215:2016 standard.

8.Certifications and Industry Standards

• In Europe, the TUV certification and in the USA, the UL certification are important indicators of compliance. The International Electrotechnical Commission (IEC) provides the basic test standards.

9.Brand Reputation and Third-Party Reviews

• Choosing a reputable brand ensures product quality and warranty support. Astronergy holds multiple certificates for product quality, ESG, traceability, and bankability. You can rely on credible third-party reviews and testimonials for further assurance.

10.Integration with Home PV System Components

• PV panels can easily integrate with other components like inverters. The connector attached to the junction box allows for seamless connection. Ensure compatibility between the PV panel and the inverter's connector type.

11.Local Building Codes and Regulations

• In certain areas, local building codes and regulations may dictate the type of PV panel that can be installed. For instance, in the Netherlands, there are usually no limitations, while in Germany, the panel's area must be smaller than two square meters.

12.Installation Process and Cost

• The installation process for PV panels can vary, and costs depend on various factors. Labor prices, geographic location, and system complexity impact installation costs. For detailed instructions, refer to the installation manual provided.

 

Conclusion

Choosing the right solar panels involves considering key specifications, space availability, weather resistance, certifications, and more. By understanding these factors and asking the right questions, you can confidently select the perfect PV panels for your home. Don't forget to consult professional installers and reputable brands to ensure a seamless and efficient solar energy system for your household.